Cercopithecus djamdjamensis (Neumann, 1902) The Bale Mountains vervet (Chlorocebus djamdjamensis) is a terrestrial Old World monkey endemic to Ethiopia, found in the bamboo forests of the Bale Mountains.

The Bale Mountains vervet have a very quiet behavior and tend to flee when encountering a human being.

[2] The Bale Mountains vervet monkey is a dietary specialist with African alpine bamboo (Yushania alpina) making up as much as 77% of its diet.

[2] The diets of Bale monkeys in continuous forests are made up of approximately 10 species of plants; however, populations in fragmented forests have considerably higher dietary diversity and consume up to five times more species.

It is unclear if this dietary flexibility is due to hybridization from grivet and vervet monkeys or if the species adapts in the absence of bamboo.

Encroaching human populations have nearly extirpated the Bale monkey from the Sidamo Highlands.